Table 4.

Free radical scavenging and protein kinase inhibition by withametelin.

Sr. No.	Sample	Free radical scavenging		Protein kinase inhibition
		% inhibition	IC50 (µM)	Clear zone (mm)	Bald zone (mm)	MIC (µM/disc)
1	C50	62.15 ± 2.37	85.0 ± 1.19
2	C20			11.19 ± 2.32	14.25 ± 2.11	45.8
3	Ascorbic acid	95.15 ± 2.46	24.4 ± 1.02
4	Surfactin			0	28.23 ± 2.63	–
5	DMSO	–	–	–	–	–

Values are presented as mean ± Standard deviation (n = 3). (--) No activity. Ascorbic acid (50 µg/ml) and Surfactin (20 µg/disc) are positive controls of DPPH scavenging and protein kinase inhibition assays, respectively. MIC is minimum inhibitory concentration. DMSO did not showed any results.